diff --git a/tcg/aarch64/tcg-target.inc.c b/tcg/aarch64/tcg-target.inc.c
index c2f38122148f169baa64d3b84bc860ab127e824f..75d819258eb55d32dc2a07bdddab28f69d461593 100644
--- a/tcg/aarch64/tcg-target.inc.c
+++ b/tcg/aarch64/tcg-target.inc.c
@@ -1940,7 +1940,7 @@ static void tcg_target_init(TCGContext *s)
                      (1 << TCG_REG_X16) | (1 << TCG_REG_X17) |
                      (1 << TCG_REG_X18) | (1 << TCG_REG_X30));
 
-    tcg_regset_clear(s->reserved_regs);
+    s->reserved_regs = 0;
     tcg_regset_set_reg(s->reserved_regs, TCG_REG_SP);
     tcg_regset_set_reg(s->reserved_regs, TCG_REG_FP);
     tcg_regset_set_reg(s->reserved_regs, TCG_REG_TMP);
diff --git a/tcg/arm/tcg-target.inc.c b/tcg/arm/tcg-target.inc.c
index db46aea38c28fb55372dbbfa250a4f8528f01d65..f0c176554b8974dfaab1d08d953bd51cf4a4c64c 100644
--- a/tcg/arm/tcg-target.inc.c
+++ b/tcg/arm/tcg-target.inc.c
@@ -2173,7 +2173,7 @@ static void tcg_target_init(TCGContext *s)
                      (1 << TCG_REG_R12) |
                      (1 << TCG_REG_R14));
 
-    tcg_regset_clear(s->reserved_regs);
+    s->reserved_regs = 0;
     tcg_regset_set_reg(s->reserved_regs, TCG_REG_CALL_STACK);
     tcg_regset_set_reg(s->reserved_regs, TCG_REG_TMP);
     tcg_regset_set_reg(s->reserved_regs, TCG_REG_PC);
diff --git a/tcg/i386/tcg-target.inc.c b/tcg/i386/tcg-target.inc.c
index 5231056fd38d9f7ea3690aa65102f535f3c19b73..0c19ab7cc200ca83ac4a903947da5cbc899bfc95 100644
--- a/tcg/i386/tcg-target.inc.c
+++ b/tcg/i386/tcg-target.inc.c
@@ -2649,7 +2649,7 @@ static void tcg_target_init(TCGContext *s)
         tcg_regset_set32(tcg_target_available_regs[TCG_TYPE_I32], 0, 0xff);
     }
 
-    tcg_regset_clear(tcg_target_call_clobber_regs);
+    tcg_target_call_clobber_regs = 0;
     tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_EAX);
     tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_EDX);
     tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_ECX);
@@ -2664,7 +2664,7 @@ static void tcg_target_init(TCGContext *s)
         tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R11);
     }
 
-    tcg_regset_clear(s->reserved_regs);
+    s->reserved_regs = 0;
     tcg_regset_set_reg(s->reserved_regs, TCG_REG_CALL_STACK);
 }
 
diff --git a/tcg/mips/tcg-target.inc.c b/tcg/mips/tcg-target.inc.c
index 750baadf3784a9fa2c9609b67bfa43ae3758a519..85c1abd14b2275f18045661b0dccacf5c49942d5 100644
--- a/tcg/mips/tcg-target.inc.c
+++ b/tcg/mips/tcg-target.inc.c
@@ -2629,7 +2629,7 @@ static void tcg_target_init(TCGContext *s)
                    (1 << TCG_REG_T8) |
                    (1 << TCG_REG_T9));
 
-    tcg_regset_clear(s->reserved_regs);
+    s->reserved_regs = 0;
     tcg_regset_set_reg(s->reserved_regs, TCG_REG_ZERO); /* zero register */
     tcg_regset_set_reg(s->reserved_regs, TCG_REG_K0);   /* kernel use only */
     tcg_regset_set_reg(s->reserved_regs, TCG_REG_K1);   /* kernel use only */
diff --git a/tcg/ppc/tcg-target.inc.c b/tcg/ppc/tcg-target.inc.c
index 3c9355844a0f5ed3d52b685780dea6d9cf946a33..44305ba9e8c218128027399be3c0fa37a8815bc9 100644
--- a/tcg/ppc/tcg-target.inc.c
+++ b/tcg/ppc/tcg-target.inc.c
@@ -2788,7 +2788,7 @@ static void tcg_target_init(TCGContext *s)
                      (1 << TCG_REG_R11) |
                      (1 << TCG_REG_R12));
 
-    tcg_regset_clear(s->reserved_regs);
+    s->reserved_regs = 0;
     tcg_regset_set_reg(s->reserved_regs, TCG_REG_R0); /* tcg temp */
     tcg_regset_set_reg(s->reserved_regs, TCG_REG_R1); /* stack pointer */
 #if defined(_CALL_SYSV)
diff --git a/tcg/s390/tcg-target.inc.c b/tcg/s390/tcg-target.inc.c
index e7ab8e4df337196b43c492c44b5e7f687459637f..01baa33673cc37070ecf2267030180fb100f04dd 100644
--- a/tcg/s390/tcg-target.inc.c
+++ b/tcg/s390/tcg-target.inc.c
@@ -413,12 +413,12 @@ static const char *target_parse_constraint(TCGArgConstraint *ct,
         break;
     case 'a':                  /* force R2 for division */
         ct->ct |= TCG_CT_REG;
-        tcg_regset_clear(ct->u.regs);
+        ct->u.regs = 0;
         tcg_regset_set_reg(ct->u.regs, TCG_REG_R2);
         break;
     case 'b':                  /* force R3 for division */
         ct->ct |= TCG_CT_REG;
-        tcg_regset_clear(ct->u.regs);
+        ct->u.regs = 0;
         tcg_regset_set_reg(ct->u.regs, TCG_REG_R3);
         break;
     case 'A':
@@ -2522,7 +2522,7 @@ static void tcg_target_init(TCGContext *s)
     tcg_regset_set32(tcg_target_available_regs[TCG_TYPE_I32], 0, 0xffff);
     tcg_regset_set32(tcg_target_available_regs[TCG_TYPE_I64], 0, 0xffff);
 
-    tcg_regset_clear(tcg_target_call_clobber_regs);
+    tcg_target_call_clobber_regs = 0;
     tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R0);
     tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R1);
     tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R2);
@@ -2535,7 +2535,7 @@ static void tcg_target_init(TCGContext *s)
     /* The return register can be considered call-clobbered.  */
     tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R14);
 
-    tcg_regset_clear(s->reserved_regs);
+    s->reserved_regs = 0;
     tcg_regset_set_reg(s->reserved_regs, TCG_TMP0);
     /* XXX many insns can't be used with R0, so we better avoid it for now */
     tcg_regset_set_reg(s->reserved_regs, TCG_REG_R0);
diff --git a/tcg/sparc/tcg-target.inc.c b/tcg/sparc/tcg-target.inc.c
index bd7c1461c61865a12484fa11cdfb8ac8f2986c99..ccd83205d5312c7e464499612d157cce0748e161 100644
--- a/tcg/sparc/tcg-target.inc.c
+++ b/tcg/sparc/tcg-target.inc.c
@@ -1771,7 +1771,7 @@ static void tcg_target_init(TCGContext *s)
                      (1 << TCG_REG_O5) |
                      (1 << TCG_REG_O7));
 
-    tcg_regset_clear(s->reserved_regs);
+    s->reserved_regs = 0;
     tcg_regset_set_reg(s->reserved_regs, TCG_REG_G0); /* zero */
     tcg_regset_set_reg(s->reserved_regs, TCG_REG_G6); /* reserved for os */
     tcg_regset_set_reg(s->reserved_regs, TCG_REG_G7); /* thread pointer */
diff --git a/tcg/tcg.c b/tcg/tcg.c
index b65a73208f70703382e77932253dbed3db2e0c09..9eeaba952976f406965beb276e8a3738972fdee2 100644
--- a/tcg/tcg.c
+++ b/tcg/tcg.c
@@ -1500,7 +1500,7 @@ static void process_op_defs(TCGContext *s)
             /* Incomplete TCGTargetOpDef entry. */
             tcg_debug_assert(ct_str != NULL);
 
-            tcg_regset_clear(def->args_ct[i].u.regs);
+            def->args_ct[i].u.regs = 0;
             def->args_ct[i].ct = 0;
             while (*ct_str != '\0') {
                 switch(*ct_str) {
@@ -2664,9 +2664,8 @@ static void tcg_reg_alloc_call(TCGContext *s, int nb_oargs, int nb_iargs,
                     tcg_out_mov(s, ts->type, reg, ts->reg);
                 }
             } else {
-                TCGRegSet arg_set;
+                TCGRegSet arg_set = 0;
 
-                tcg_regset_clear(arg_set);
                 tcg_regset_set_reg(arg_set, reg);
                 temp_load(s, ts, arg_set, allocated_regs);
             }
diff --git a/tcg/tcg.h b/tcg/tcg.h
index e342fe614f34181757cf7c843b808a53b5a5033f..6525e51c2130a374ccb70ef62405c2c4afc144c8 100644
--- a/tcg/tcg.h
+++ b/tcg/tcg.h
@@ -186,7 +186,6 @@ typedef enum TCGOpcode {
     NB_OPS,
 } TCGOpcode;
 
-#define tcg_regset_clear(d) (d) = 0
 #define tcg_regset_set(d, s) (d) = (s)
 #define tcg_regset_set32(d, reg, val32) (d) |= (val32) << (reg)
 #define tcg_regset_set_reg(d, r) (d) |= 1L << (r)
diff --git a/tcg/tci/tcg-target.inc.c b/tcg/tci/tcg-target.inc.c
index 94461b2baf95cfa718530fe789b5edc2d5bd2b49..f9644334ccd35b275d30d917b78e58ff2aa9ac87 100644
--- a/tcg/tci/tcg-target.inc.c
+++ b/tcg/tci/tcg-target.inc.c
@@ -879,7 +879,7 @@ static void tcg_target_init(TCGContext *s)
     tcg_regset_set32(tcg_target_call_clobber_regs, 0,
                      BIT(TCG_TARGET_NB_REGS) - 1);
 
-    tcg_regset_clear(s->reserved_regs);
+    s->reserved_regs = 0;
     tcg_regset_set_reg(s->reserved_regs, TCG_REG_CALL_STACK);
 
     /* We use negative offsets from "sp" so that we can distinguish